Oxyacetylene cutting-machine for circular plates



FnKlLTS AND L. A. PARADIS. OXYACETYLENE CUTTING MACHINE FOR CIRCULAR PLATES.

APPLICATION FILED MAY 5. 1919.

1,348,363. I PatentedAug. 3, 1920.

FRANK KILTS AND LOUIS A. PARADIS, OF CHICAGO, ILLINOIS.

OXYACETYLENE CUTTING-MACHINE FOR CIRCULAR FLATES.

Specification of Letters Patent.

Patented Aug. 3, 1920.

Application filed May 5, 1919. Serial No. 294,889.

To all whom it may concern:

Be it known that we, FRANK KIL'rs and LOUIS A. PARADIS, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Oxyacetylene Cutting-Machines for Circular Plates, of which the following is a specification.

Our invention relates to an oxyacetylene machine for cutting circular plates, and has particular reference to a hand operated port able machine which can easily and quickly be moved from place to place and set in proper position.

Another object of our invention is the provision of a machine which can be easily and quickly adjusted for the cutting of plates of various diameters, and which will cut the plates accurately, and which is simple and efficient in operation and easily handled.

Another and further object of our invention is the provision of a machine which can easily be adjusted to cut beveled edges or straight edges on the plates to conform to different requirements and without any material alteration of the machine.

Our invention will be further and better understood by reference to the accompanying drawings in which- Figure 1 is a view in elevation of our improved machine. I

Fig. 2 is a plan View looking downward upon the machine, and,

Fig. 3 is a view of a bracket which is to be attached to the machine .for cutting small plates.

Referring now specifically to the drawing, a circular base plate 10 is shown which has a plurality of sharpened pins 11, 11, extending downwardly therethrough, these pins being sharpened on their lower ends to prevent the base plate from slipping out of position. A member or standard 12 having an annular shoulder 13 near its lower end is and a lower portion 14 which rests upon an annular collar 15 formed upon the member 12 near its upper end and having an integrally formed upwardly extend ng portion 29 for the purpose hereinafter described. Mounted upon the upper end of the member 12 and between the portions 14 and 14 of the member 14 is a gear wheel 16 which is keyed to the member 12 or secured thereto in any suitable manner, so that as the gear wheel 16 is rotated the member 12 will be rotated also, and in a corresponding direction. Mounted in the outer end of the member 14 is a shaft 17 having aworm gear 18 mounted thereon and in mesh with the gear wheel 16. A collar 19 is secured to the shaft 17' by means of a key 20, which holds the shaft in proper position. A brace rod,23 is secured to the portion 29 of the member 14 at its inner end, a head portion 24 being provided within which the portion 29 is mounted. The brace rod 23 at its outer end is secured to the upper end of a stand 30 by means of a bolt 25 and which acts as a support for the outer end of the shaft 17 and holds it in proper position, the lower ends of the stand 30 resting upon the ground. The shaft 17 extends through the outer end of the member 23 and is held against outward movement by a collar 26 which is secured to the shaft 17 by means of a pin 27, the collars 19 and 27 which abut against the outer end of the member 23 and the member 14 respectively therefore serve to hold the shaft 17 in proper position. A crank 28 is secured to the outer end of the shaft 17 so that an operator may turn the shaft 17 as desired.

Secured to the member 21 is an outwardly extending arm 31 which is clamped to the member 12 by means of a pair of bolts 32, 32, and which is movable up and down upon the member 12 so as to provide proper ad;

justment of the blow torch-as hereinafter described. Secured to the outer end of the arm 31 is a U-shaped torch holder 32, having a member 33 mounted thereon, to which is secured a set screw 34 in threaded engagement with the member 32 on one of its sides, and which is adapted to be moved by means of the screw 34 so as to hold the blow torch in position shown in Fig. 2. Holes such as 35, 35 are provided in the member 31 so as to enable the U shaped member 32 to be positioned at different points on the member 31 described.

by means of the bolt 36 on the under side of the member 32. Extending outwardly from the member 12 and integral therewith is an The member 41 has a vertical groove 43 within which is mounted a nozzle holder 44 having a hole 45 in its outer end' throu h which a nozzle 46 of the torch extends. ecured to the nozzle holder 44 is an adjusting screw 47 inthreaded engagement with the upper end of the member 41 and adapted to move the nozzle holder 44 up and down in the slot 43 so as to provide a properadjustment of the nozzle away from the plate which is being cut.

The blow-torch comprises the nozzle 46, which fits through the nozzle holder 44 and is connected to a pair of members 48 and 49 which are secured in turn to a cylindrical member 50 which is adapted to be held in the holder 32. Suit attached to the bracket 55.

able pipes 51 and 52 lead to the nozzle 46 and have connected thereto. in any suitable manner a pair of hose pipes 53, 54 which lead to supply tanks of oxygen and acetylene, or any other suitable gas for use in the'blow torch. Referring now specifically to Fig. 3, and wherein is shown a bracket 55 such as may be used for cutting small diameter plates.

This bracket has a air of holes 56, 56, by means of which the bracket is secured to the member 37 by means of bolts 38. A hole 57 is provided by means of which the lengthening arm 39, herein previously described, is In case it is desired to cut plates with beveled edges, then the members 41 and- 44 can be tilted at the proper angle and the cutting torch securel fastened in position as hereinafter describedl It will also be understood that different length extension arms may be secured to the members 31 and 37, thus making it possible 'to out plates of different diameters than what is shown by the adjustments of the machine as shown in the drawings. It will be thus understood that the diameter of the plates is limited only by the length of the shaft 17 and the brace 23.

The method of operation of the machine is extremely simple. The metal squares or plates from which the circular plates are to be out are marked in any suitable manner from a suitable center. so that the machine may be positioned properly and the torch adjusted in its proper position with respect to the angle of cut and distance of the metal by means of the screw 47 and the shoe 43 which fits into the head portion-40 of the member 39. The base 10 is properly adout of which the plates are beingcut. This ,will, of course, depend upon the qualit of the metal, its hardness, thickness, etc.

on a plate being'cut the machine is suflicie tly light so that itmay be picked up and moved to a new position and where the operation is continued. I

- While we have described more or less prewish to be understood as limiting ourselves thereto, as we' contemplate changes in form cisely the details of construction, we do not and'the proportion of parts, and the substitution of equivalents, as circumstancesmay suggest or render expedient, without'departingfrom the spirit or scope of our invention.

eclaim: 1. In a plate cutting device the combinationof a base, a rotatable standard mounted upon said base, a gear wheel mounted upon said standard, hand 0 erated means for turning the said gear w eel, and a pair of arms secured to said standard for holding a blow torch in position..

2. In a plate cutting device, the combination of a base, a rotatable standard mounted upon said base, a gear wheel mounted upon said standard at its upper end, hand operated means for turning the gear wheel, a

pair of arms secured to said cylindrical member for holding a blow torch in posi-.

tion, one of said arms being adjustable vertically on. said rotative member and an adjustable nozzle holder secured to the other one of said arms.

3. Ina plate cutting device, the combination of a base, a rotatable standard mounted upon said base, a gear wheel mounted upon said standard at its upper end, a shaft having a gear wheel mounted thereon and inengagement with said first mentioned gear Wheel, means for supporting the said shaft in cooperative positlon, an adjustable arm secured to said standard for supporting a blow torch, and means secured to said standard for holdinga gas supply hose in position.

4. In a plate cutting device, the combinacured to one of said arms, the said holder being capable of adj ustment to various tion, a hand operated means for turning said angles. arms around said base. 5. In a plate cutting device, the combina- Signed at Chicago, Illinois, this 30th day 19 tion of a base, a rotatable standard mounted of April, 1919. 5 upon said base, a plurality of laterally extending arms secured to said rotatable stand- FRANK KILTS. lard adapted to hold a blow torch in posi- LOUIS A. PARADIS. 

